Replace content in multiple files

replace_in_files.py

import fnmatch
import os
import re


for directory, dirnames, filenames in os.walk("."):
    for f in fnmatch.filter(filenames, "*.yml"):
        path = os.path.join(directory, f)

        with open(path) as file:
            content = file.read()

        ####
        pat = r"(?<= {8}- input_arguments:\n) {10}- type: \w+\n {11}"
        content = re.sub(pat, " " * 10 + "-", content)
        ####

        with open(path, "w") as file:
            file.write(content)

'''
import os
import re
import shutil
import tempfile


for directory, dirnames, filenames in os.walk("."):
    for f in filenames:
        if not f.endswith(".yml"):
            continue

        orig_path = os.path.join(directory, f)

        with open(orig_path) as orig:
            content = orig.read()

        ####
        pat = r"(?<= {8}- input_arguments:\n) {10}- type: \w+\n {11}"
        content = re.sub(pat, " " * 10 + "-", content)
        ####

        with tempfile.NamedTemporaryFile() as temp:
            temp.write(content.encode("utf-8"))
            temp.flush()
            shutil.copy2(temp.name, orig_path)
'''